20040306 has 32 divisors (see below), whose sum is σ = 47089728. Its totient is φ = 5605440.

The previous prime is 20040301. The next prime is 20040311. The reversal of 20040306 is 60304002.

It is an interprime number because it is at equal distance from previous prime (20040301) and next prime (20040311).

It is a super-2 number, since 2×20040306² = 803227729147272, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20040301) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10821 + ... + 12536.

It is an arithmetic number, because the mean of its divisors is an integer number (1471554).

Almost surely, 2^20040306 is an apocalyptic number.

20040306 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

20040306 is an abundant number, since it is smaller than the sum of its proper divisors (27049422).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20040306 is a wasteful number, since it uses less digits than its factorization.

20040306 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23386.

The product of its (nonzero) digits is 144, while the sum is 15.

The square root of 20040306 is about 4476.6400346689. The cubic root of 20040306 is about 271.6239848302.

Adding to 20040306 its reverse (60304002), we get a palindrome (80344308).

The spelling of 20040306 in words is "twenty million, forty thousand, three hundred six".